scRNA-Seq Analysis Revealed CAFs Regulating HCC Cells via PTN Signaling

Area of Science:

• Oncology
• Cell Biology
• Molecular Biology

Background:

• Cancer-associated fibroblasts (CAFs) significantly influence the tumor microenvironment in hepatocellular carcinoma (HCC).
• The precise mechanisms by which CAFs drive HCC progression are not fully elucidated.
• Understanding CAF-mediated signaling is crucial for developing targeted HCC therapies.

Purpose of the Study:

• To investigate the role of CAFs in HCC progression.
• To identify potential molecular pathways involved in CAF-HCC cell interactions.
• To explore the PTN/SDC2 signaling axis in the context of liver cancer.

Main Methods:

• Analysis of single-cell RNA sequencing datasets (GSE158723, GSE112271) from HCC patients.
• Examination of clinical HCC samples using Masson staining, immunofluorescence, and flow cytometry.
• In vitro studies involving Huh7 liver cancer cells and LO2 normal liver cells with immunofluorescence assays.

Main Results:

• CAFs were more abundant in HCC tissues than adjacent non-cancerous tissues.
• Pleiotrophin (PTN) expression was elevated in HCC tissues, consistent with scRNA-seq data.
• Syndecan-2 (SDC2) was significantly upregulated in Huh7 liver cancer cells compared to LO2 cells.

Conclusions:

• CAFs may promote HCC progression via the PTN/SDC2 signaling pathway.
• This pathway represents a potential therapeutic target for liver cancer.
• Findings enhance understanding of CAF-HCC cell crosstalk within the tumor microenvironment.